# Topic 8 & 9 Energy, work & power Flashcards Preview

## Edexcel GCSE Physics > Topic 8 & 9 Energy, work & power > Flashcards

Flashcards in Topic 8 & 9 Energy, work & power Deck (30)
1
Q

1 What are the units for energy?

A

joules

2
Q

2 How is energy transferred to a light bulb?

A

by electricity

3
Q

3 How is energy transferred away from a light bulb?

A

by light, by heating

4
Q

4 Describe one other way in which energy can be transferred.

A

by sound, by forces

5
Q

5 What is a force?

A

a push or a pull

6
Q

6 What are the units for measuring forces?

A

newtons

7
Q

A

the force of gravity pulling on you

8
Q

8 What does work done mean in physics?

A

energy transferred by a force

9
Q

9 What does power measure?

A

how fast energy is transferred/work is done

10
Q

10 What are the units for power?

A

watts

11
Q

11 What does work done mean?

A

energy transferred by a force

12
Q

12 What are the units for work done?

A

joules

13
Q

13 How do you calculate work done?

A

Multiply force by distance moved in the direction of the force.

14
Q

14 What does power mean?

A

how fast energy is transferred

15
Q

15 What are the units for power?

A

watts

16
Q

16 How do you calculate power?

A

work done divided by time

17
Q

17 Two people with the same weight go up a flight of stairs. How can you tell which one has exerted more power?

A

the one that went up fastest

18
Q

18 Name two non-contact forces.

A

two from: gravity, magnetism, static electricity

19
Q

19 What is a magnetic field?

A

the space around a magnet where it can affect things

20
Q

20 What is a vector quantity?

A

a quantity that has both magnitude and direction

21
Q

21 Name two contact forces.

A

any two from: normal contact force, upthrust, air resistance, etc.

22
Q

22 Name three non-contact forces.

A

gravity, magnetism, static electricity

23
Q

23 How is a force represented in a diagram?

A

arrow showing direction, with length indicating size

24
Q

24 What are the units for measuring force?

A

newtons

25
Q

25 Why is weight a vector quantity?

A

It has a direction as well as a magnitude.

26
Q

26 The Earth attracts the Moon via gravity. What is the other force in this action?reaction pair?

A

the Moon attracting the Earth

27
Q

27 What is the name for the space around an object where it attracts things with mass?

A

a gravitational field

28
Q

28 What is the name for the space around something with an electric charge where it can affect other objects?

A

an electrostatic or electric field

29
Q

29 What is the name for a single force that represents the combined effects of all the forces on an object?

A

a resultant force

30
Q

30 What is the name for a diagram where a measurement on the diagram represents a larger measurement in real life?

A

a scale diagram